textproduct: Quad Cities

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

KEY MESSAGES

- Cooler and less humidity this week, with heat returning this weekend with mainly dry conditions through the weekend.

LONG TERM /WEDNESDAY THROUGH MONDAY/

Issued at 312 PM CDT Tue Jul 21 2026

A northwest flow pattern remains in place through much of the period with a broad flat ridge building through the intermountain west through late week. The ridge begins to build slightly further east into the central US into the weekend. A weak shortwave will drop southeastward through the area late Thursday and bring a chance for some showers and thunderstorms, with mainly dry conditions otherwise across the area.

Much cooler air aloft will keep temperatures cooler and below the seasonal averages through the end of the week. Thermal ridging builds eastward into the area with H85 temperatures increasing back into the mid to upper 20s Celsius by this weekend with the heat returning to the area. Southerly flow off the Gulf returns by late Sunday into early next week should allow the humidity to return as well.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 312 PM CDT Tue Jul 21 2026

Northwesterly gusty winds becoming more northerly to northeasterly at times into Wednesday. Gusts should diminish with sunset with lighter winds into Wednesday as high pressure builds into the area. VFR CU field remains this afternoon with clearing skies toward sunset into the overnight hours.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.

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